White clover, FALSE DANDELION (thank you, commenters), purple clover, fleabane, narrow leaf plantain.
I found this great site about plant uses called Eat the Weeds. Here are the files on each of these guys.
White Clover, not poisonous in general. Also, not good. Apparently, you should never ferment it. Fresh or dried only. I’ll have to stop my whole clover fermenting operation! You too? I know, right?! GOSH.
False Dandelion. There are several, but this one is H. radicata. Apparently, it’s prepared a lot like dandelions.
Rough Fleabane, Erigeron strigosus. There appears to be a bit of debate on its edibility. Regardless, it’s not outright poisonous. Some folks with very sensitive skin might get itchy from it.
Smartweed, NOT poisonous. It is peppery and should be used sparingly, however. Don’t want to make a salad of it. Too spicy!
Buttercups, two varieties. POISONOUS! Not until the cells are crushed, like in chewing. So, no danger reflecting it on your kids’ chins. (Apparently, there’s a lot of science that went into explaining the reflective nature. Read the linked article.) Just don’t chew on them. Thankfully, they taste HORRID to people. But domestic animals are not so discerning. Poisonous to dogs, cats, grazing animals.
Dunno. It might be a wildflower the kids planted. I’ll try to get around to it today and edit the post.
Black Medic, not poisonous, but the linked writer is on the fence about eating much of it. Something about a chemical in it being related to something else. Go read and decide.
FYI, the botany fires have been lit. Expect a LOT more of this.